A 220 V main supply is connected to a resistance of 100 k ohms. The effective current is
Correct answer: A. 2.2mA
- A. 2.2mA
- B. 2.2/√2 mA
- C. 2.2 x √2 mA
- D. None of the above
Explanation
By Ohm's law; V=IRIrms = Vrms/R = 220/100x10(3) = 2.2x10(-3) A= 2.2mA
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About AC Through Resistor, Capacitor and Inductor
Alternating current through a resistor, capacitor and inductor involves phase relationships between voltage and current, reactance, impedance and energy transfer. A resistor keeps voltage and current in phase, while a capacitor and inductor produce opposite phase shifts, a distinction used in circuit diagrams and numerical calculations.
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